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(Bundel- M. D. STRIGKLAND.

INJBG'TOR.

Patented Dec. '2.2, 188.5.

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UNITED STATES PATENT OFFICE.

MORGAN D. STRIOKLAND, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO CHARLES D. CARROLL, OF SAME PLACE.

INJECTOR.

SPECIFICATION forming part of Letters Patent Nuo. 333,086, dated December 22, 1885.

Application filed August 17, 1885. Serial No. 174,659. (Model.)

To all whom it may concern,.-

Be it known that I, MORGAN D. STRICK- LAND, of St. Louis, Missouri, have made a new and useful Improvement in Injectors, of which the following is a full, clear, and exact description.

By means of the present improvement, which renders an injector more reliable and efdcient, the feed-water in its ilow to the injector is directed in such a manner as to render it useful in keeping down the temperature of the combining-tube, especially at its narrowest part; and also in presenting the parts in the irnmediate vicinity of the inlet to the combiningtube from becoming overheated.

The means for carrying out the improvemeut are shown in the annexed drawings, making part of this specification, in Which- Figure 1 is a longitudinal section oi' an injector having the improvement. The section is on the line 1 lof Fig. 2. Only thatportion of the injector is exhibited as is necessary to an understanding of the improvement. Fig. 2 is a section on the line 2 2 of Fig. 1. The casing around the combining-tube is shown partly in elevation and partly in section. Fig. 3 isacross-section on the1ine3 Sof Fig. 2.

The same letters of reference denote the same parts.

Saving as modified by the improvement, the injector A is of the customary form, the steamsupply inlet a, the steam-jet tube b, the com bining-tube c, the overflow d, and the wateroutlet e being substantially such as are commonly used in injectors. Surrounding the combining-tube, and so as to incluse an annular space, f, or substantially an annular space around the combining-tube and extending from opposite, or thereabout, the narrowest part g of the combining-tube to the inlet h into the combining-tube, isa casing, i. It is preferably in the form of atube, and it is preferably made in one piece with the combining-tube by ex-` tending it from the ange j of the combiningtube, substantially as is represented in the drawings, and Vit is preferably extended past the inleth, and adapted at its upper end to support'the steam-jet tube b; but howevershaped or extended at its upper end, the casing so connects with the shell la ofthe injector as to prevent the feed-water from owing from the l water-supply pipeZ directly to the inlet h. On

the contrary,- the only or perhaps the chief inlet for the water coming from the pipe Z, by which it can enter the space f, is the perforation or perforations m in or near the lower end of the casing. The flow is therefore first to that part of the space f which surrounds the neck of the combining-tube, and then along the combining-tube to its inlet JI. The coolest water is thus brought in contact with that part of the combining-tube which most needs cooling, and as the space j isa comparatively narrow one there is no opportunity for the water to become stagnant, and then in a short time heated at any point along the route which it takes through the space f, and especially opposite the part g; but all of it must flow regularly into the combining-tube. At the same time it will be noticed the indowing water from the pipe Zcomes against the outerv side of the upper end, n, of the casing. This is important, for the heat of thel steam, the steam-jet tube, and the parts surrounding the steam-jet tube is continually being communicated to the casing or whatever incloses the water opposite the inlet h,and the waterwithin the casing, in consequence,is liable to be overheated, and but for the contact of theinilowing water with the exterior of the casing at the pointin question the casing would become so heated as in turn to heat the water within it. As it is,the water encounters the exterior of the casing throughout or substantially throughout its length, and the desired result -narnely, acomparatively cool body of water throughout the space f, is obtained. The pipe Z, it will beseen, comm unicates with the annular space o (which surrounds the casing i) opposite the upper end of the casing. This is better than arranging the pipe Z at a lower level. The pipe Z in diameter might equal the height of the casing. It is preferable, however, to construct it as is represented, and cause the water to flow against the part n of the casing, and thence pass downward into the lower end, p, of the space o, whence it iiows through the openings m, as indicated by the arrows in Figs. 1, 2.

The steam-jet tube may or may not have a nozzle, g.

I claim- 1. An injector having a casing within the in- IOO jectorshell and surrounding the combining- 3. The combination of theshellk, the steamtube, allowing the feed Water to flow against jet tube b, the combining-tube c, the casing i', the exterior of the casing, but cutting off the perforated at m, and the Water-supply pipe Z, direct 110W of thei'eed-Water tothe combiningleading into the annular space o, which in I5 5 tube inlet,` and directing it first to around the turn extends below the pipe Z at p, substan lower end of the combining-tube and thence tially as described.

along the combining-tube to its inlet, sub- Vitness my hand. stantially as described. Y MORGAN D. STRICKLAND.

2. The combination of the shell 7c, the steam- Vitnesses: ro jet tube b, the combining-tube c, the ange j, C. D. MOODY,

and the tube i', substantially as described. J. W. HOKE. 

